JPH0577602U - accumulator - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] When arranging the oil port for the oil port mounting opening of the shell, welding work is eliminated, which in turn prevents heat from accumulating in the shell, and prevents foreign matter from entering the shell. It prevents the entry into the oil port mounting opening or the liquid chamber, and consequently improves the manufacturing efficiency and quality. [Constitution] Shell (11) in engagement groove (14d) of oil port (14)
Insert the oil port mounting opening (11a) of the
A seal member (15) is arranged between the oil port (14) and the end surface of the oil port mounting opening (11a) of 1) or the peripheral surface in the vicinity thereof. [Effect] When arranging the oil port for the oil port mounting opening of the shell, welding work can be eliminated, and eventually heat can be prevented from being accumulated in the shell, and foreign matter can enter the oil port mounting opening of the shell or the liquid chamber. Can be prevented, and as a result, manufacturing efficiency and quality can be improved.

Description

[Detailed description of the device]

[0001]

[The purpose of the device]

[0002]

[Industrial applications]

 The present invention relates to an accumulator in which an oil port is installed with respect to an oil port mounting opening of a shell whose internal space is divided into a gas chamber and a liquid chamber by a bladder. The present invention relates to an accumulator in which the oil port mounting opening is engaged and a seal member is disposed between the oil port and the end surface of the oil port mounting opening of the shell or the peripheral surface thereof.

[0003]

[Prior Art]

 Conventionally, as this type of accumulator, the oil port mounting opening of the shell element in which the bladder is disposed is reduced by a molding device so that the base extension portion of the oil port is arranged with respect to the oil port mounting opening of the shell. It has been proposed that the base of the oil port be welded to the oil port mounting opening of the shell by arc welding, plasma welding, or electron beam welding.

[0004]

[Problems to be solved]

 However, in the conventional accumulator, the base of the oil port is welded to the oil port mounting opening of the shell by arc welding, plasma welding, or electron beam welding, so (i) the welding speed is slow and heat accumulates in the shell. In addition, there is a drawback that the bladder arranged inside the shell is easily damaged by the heat accumulated in the shell (for example, generation of pinholes or burnout), and (iii) oil. When welding the port, there was a drawback that foreign matter entered the welded part or the inside of the shell, and as a result, (iv) there was a drawback that sufficient manufacturing efficiency and quality could not be achieved.

Therefore, in order to eliminate these drawbacks, the present invention is such that the oil port mounting opening of the shell is engaged in the engaging groove of the oil port, and the end surface of the oil port mounting opening of the shell or the peripheral surface thereof and the oil. It is intended to provide an accumulator having a seal member arranged between the port and the port.

[0006]

[Device configuration]

[0007]

[Means for solving problems]

 The solution provided by the present invention is to solve the problem, "In an accumulator in which an oil port is arranged with respect to an oil port mounting opening of a shell whose internal space is divided into a gas chamber and a liquid chamber by a bladder, The oil port mounting opening (11a) of the shell is fitted into the groove (14d) of the port, and the seal member (15) is provided between the oil port and the end surface of the oil port mounting opening (11a) of the shell or the peripheral surface. ) Is provided. ”Is an accumulator.

[0008]

[Action]

 The bladder for the accumulator according to the present invention is, as described in the section of “Solution to problems” described above, provided with respect to the oil port mounting opening of the shell whose internal space is divided into the gas chamber and the liquid chamber by the bladder. An accumulator in which an oil port is provided, and in particular, an oil port mounting opening of the shell is fitted in a fitting groove of the oil port, and the end surface of the oil port mounting opening of the shell or a peripheral surface thereof and the oil port. Since a seal member is provided between the oil port and the shell, (i) the welding work is eliminated when the oil port is installed in the oil port mounting opening of the shell, and (ii) the oil port mounting of the shell. It has the function of avoiding heat accumulation in the shell when arranging the oil port for the opening, and (iii) is opposed to the oil port mounting opening of the shell. Hand foreign matter upon disposition of the oil port without the effect of blocking that you penetrate the oil port mounting opening to the liquid chamber of the shell that, an action that allowed to result in (iv) improve the production efficiency and quality.

[0009]

【Example】

 Next, an accumulator according to the present invention will be described in detail with reference to the accompanying drawings and preferred embodiments thereof.

However, the embodiments described below are provided for facilitating or facilitating the understanding of the present invention, and not for limiting the present invention.

In other words, each element disclosed in the embodiments described below includes all design changes and equivalent replacements within the spirit and technical scope of the present invention.

(Description of the accompanying drawings)

FIG. 1 is a sectional view showing an embodiment of an accumulator according to the present invention.

FIG. 2 is a flow chart showing the manufacturing procedure of the embodiment shown in FIG.

FIG. 3 is a cross-sectional view for explaining the manufacturing procedure of the embodiment shown in FIG. 1, in which a screw member 14b is gripped by a gripping member 31 included in the manufacturing apparatus 30 and is hung. The state in which the seal member 15 is disposed in the disposition groove 14e of the oil port 14 is shown.

FIG. 4 is a cross-sectional view for explaining the manufacturing procedure of the embodiment shown in FIG. 1, in which the shell body 11 ^* in which the bradder 20 is arranged is included in the manufacturing apparatus 30. Placed in the recess of the lower mold 32, hold the oil port 14 with the gripping member 31 and hang it, and then lower the upper mold 33 included in the manufacturing apparatus 30 along the gripping member 31. It shows a state in which the oil port mounting opening 11a ^* of the shell element body 11 ^* is about to be reduced by moving it toward 32.

FIG. 5 is a cross-sectional view for explaining the manufacturing procedure of the embodiment shown in FIG. 1, in which the shell body 11 ^* in which the bradder 20 is arranged is included in the manufacturing apparatus 30. Placed in the recess of the lower mold 32, hold the oil port 14 with the gripping member 31 and hang it, and then lower the upper mold 33 included in the manufacturing apparatus 30 along the gripping member 31. The accumulator element body 10 ^* is created by bringing it closer to 32 and reducing the oil port mounting opening 11a ^* of the shell element body 11 ^* to fit it in the engagement groove 14d of the oil port 14. Is shown.

FIG. 6 is a cross-sectional view for explaining the manufacturing procedure of the embodiment shown in FIG. 1, which is included in the manufacturing apparatus 30 on the outer peripheral surface of the oil port 14 included in the accumulator element body 10 ^*. Further, the oil port 14 is contracted by pressing the roller 34 toward the engaging groove 14d.

FIG. 7 is a cross-sectional view for explaining the manufacturing procedure of the embodiment shown in FIG. 1, which is included in the manufacturing apparatus 30 with respect to the outer peripheral surface of the oil port 14 included in the accumulator element body 10 ^*. The roller 34 is pressed to reduce the oil port 14 toward the engaging groove 14d, and then the gripping member 31 and the lower mold 32 included in the manufacturing apparatus 30 are removed, and an inert gas is supplied to the gas chamber 11A of the shell 11. The state which created the accumulator 10 concerning this invention by filling and enclosing is shown.

(Structure of Example)

First, referring to FIG. 1, the configuration of an embodiment of the accumulator according to the present invention will be described in detail.

Reference numeral 10 denotes an accumulator according to the present invention, and an inner space of the shell 11 is divided into a gas chamber 11A and a liquid chamber 11B by a bladder 20 described later. That is, the accumulator 10 according to the present invention directs the elastic mounting portion 21a toward the inner peripheral surface of the shell 11 by the mounting member 12 so that the outer peripheral surface of the peripheral edge portion 21B of the bladder 20 is brought into contact with the inner peripheral surface of the shell 11. The bladder 20 is disposed on the inner peripheral surface of the shell 11 by pressing it by pressing, and the internal space of the shell 11 is partitioned into a gas chamber 11A and a liquid chamber 11B.

The gas chamber 11A of the shell 11 is filled with an appropriate inert gas (for example, nitrogen gas) from the gas supply port 11b, and then the closing member (so-called “gas plug”) 13 and the sealing member (here, It is sealed by closing the gas supply port 11b with an O-ring) 13a.

In the liquid chamber 11B of the shell 11, an oil port (that is, a liquid inlet / outlet member) 14 having a liquid guide hole 14a whose inner opening can be closed by a poppet 23 described later is arranged in the oil port mounting opening 11a. As a result, an appropriate liquid supply source (not shown) can be communicated. That is, the liquid chamber 11B of the shell 11 has a liquid guide hole formed by screwing a screw portion of a liquid supply pipe (not shown) with a screw portion 14b formed on the peripheral surface of the tip of the oil port 14. It communicates with an appropriate liquid supply source through 14a and a liquid supply pipe, and an appropriate amount of liquid (for example, brake fluid, water or oil) is supplied according to the liquid pressure of the liquid supply source.

The oil port 14 is formed in the vicinity of the base extension part 14c in addition to the liquid guide hole 14a and the screw part 14b, and the engagement groove 14d into which the oil port attachment opening 11a of the shell 11 is engaged, and the engagement port 14d. It is formed in the base expansion part 14c so as to open to the entry groove 14d and secures the seal between the inner peripheral surface of the oil port mounting opening 11a of the shell 11 and the base expansion part 14c. It includes a disposing groove 14e for accommodating a seal member (here, an O-ring) 15.

Reference numeral 20 denotes a bladder incorporated in the accumulator 10 according to the present invention. The bladder 20 includes a central portion 21A and a peripheral portion 21B and a central portion 21B whose end faces are formed in a protruding direction of the central portion 21A in an unloaded state. The elastic material layer 21 made of a suitable elastic material such as rubber and including the curved inversion portion 21C for connecting the peripheral portion 21B and the peripheral edge portion 21B to each other, and the inside of the elastic material layer 21 as desired. The gas shielding layer 22 is provided, and the poppet 23 is provided on the outer peripheral surface of the central portion 21A of the elastic material layer 21 (that is, the surface located on the liquid chamber 11B side). ..

[0027] the elastic material layer 21 of the bladder 20 when the bladder 20 is mounted on the inner peripheral surface of the shell 11 included in the accumulator 10 according to the present invention as described above by the mounting member 12, the inner periphery of the shell 11 (I) The thick elastic mounting portion 21a extended along the end face of the peripheral edge portion 21B is made of an appropriate elastic material such as rubber so that a sufficient seal can be secured between the peripheral edge portion 21B and the peripheral surface of the peripheral edge portion 21B. An elastic projection (not shown) is formed on the inner peripheral surface (that is, the surface located on the side of the gas chamber 11A described above), and (ii) an elastic projection (not shown) extending along the end surface of the peripheral edge portion 21B is also formed. It is formed on the outer peripheral surface of the peripheral portion 21B.

Although not shown in the drawings, the gas shielding layer 22 of the bladder 20 is made of polyvinyl alcohol resin, polyvinyl fluoride resin or the like on at least one surface of a reinforcing material such as woven cloth (for example, knitted cloth) or nonwoven cloth. Alternatively, it is formed by a resin film having a low gas permeability made of vinylidene chloride resin or the like or a gas shielding film made of a metal foil, and at least one reinforcing material and one gas shielding film are provided. However, the gas shielding layer 22 may be formed of at least one gas shielding film without the reinforcing material, if desired.

(Manufacturing Procedure of Examples)

Further, a manufacturing procedure of an embodiment of the accumulator according to the present invention will be described with reference to FIGS. 1 to 7.

When manufacturing the accumulator 10 according to the present invention, in the first step, as shown in FIG. 3, the screw portion 14b of the oil port 14 is gripped by the gripping member 31 included in the manufacturing apparatus 30. The oil port 14 is suspended, and in that state, the seal member 15 is moved along the gripping member 31 and disposed in the disposition groove 14e of the oil port 14.

When manufacturing the accumulator 10 according to the present invention, in the second step, as shown in FIG. 4, the shell body 11 ^* is placed in the recess of the lower mold 32 included in the manufacturing apparatus 30. It By the way, the bladder 20 is attached to the shell body 11 ^* in advance by the attachment member 12 for the purpose of securing the gas chamber 11A and the liquid chamber 11B.

When manufacturing the accumulator 10 according to the present invention, in the third step, the oil port mounting opening 11a ^{* of} the shell element 11 ^* placed in the recess of the lower mold 32 included in the manufacturing apparatus 30 is manufactured ^. By moving the upper mold 33 toward the upper mold 33, the oil port mounting opening 11a ^* of the shell body 11 ^* is contracted by the recess of the upper mold 33 as shown in FIG. The accumulator element body 10 ^* is inserted into the groove 14d.

In manufacturing the accumulator 10 according to the present invention, in the fourth step, the oil port mounting opening 11a ^* of the shell element 11 ^* is inserted into the engaging groove 14d of the oil port 14 and the accumulator element 10 is inserted. After being set to ^* , the upper mold 33 is moved upward along the gripping member 31 and is made to stand by.

Accumulator according to the present inventionTenWhen manufacturing the, in the fifth step, manufacturing equipment30The upper mold 33 contained in the accumulator body is moved along the gripping member 31. 10 ^*  Is held by the gripping member 31 and the lower mold 32, and then the gripping member 31 and the lower mold 32 are moved by the arrow W.₁ Direction and manufacturing equipment30Roller 34 included in arrow W₂ Roller 34 while rotating in the direction10 ^*  By bringing it into contact with the outer peripheral surface of the oil port 14 included in the oil port 14, the oil port 14 is reduced toward the engaging groove 14d as shown in FIG.

In manufacturing the accumulator 10 according to the present invention, in a sixth step, the accumulator element body 10 ^* is removed from the gripping member 31 and the lower mold 32 included in the manufacturing apparatus 30 , and the gas of the shell 11 is removed. The chamber 11A is filled with an inert gas, and the gas plug 13 and the seal member 13a are arranged and sealed in the gas supply port 11b to complete the accumulator 10 according to the present invention as shown in FIG. As shown in FIG. 1, the accumulator 10 according to the present invention is connected to an appropriate liquid supply source by screwing a screw portion 14b of an oil port 14 with a screw portion of a liquid supply pipe, and the liquid supply source is connected to the accumulator 10 . It is provided to alleviate fluctuations in the liquid pressure of the.

(Operation of Example)

Further, referring to FIG. 1, the operation of one embodiment of the accumulator according to the present invention will be described in detail.

When there is no load

Accumulator according to the present inventionTenThe bladder has a moderate liquid pressure in the liquid supply (not shown).20Is unloaded as shown in Figure 1, the bladder 20 However, it is inverted at the curved reversing portion 11C and protrudes toward one side (that is, the side corresponding to the gas chamber 11A) at the central portion 21A in the same direction as the end surface of the peripheral portion 21B. At this time, bladder20 Since no load is applied to the elastic material layer 21 at the central portion 21A, the elastic material layer 21 is not deformed and tensile stress is not generated.

During liquid discharge

On the other hand, when the liquid pressure of the liquid supply source is reduced as compared with the unloaded state shown in FIG. 1, the accumulator 10 according to the present invention has the central portion 21A of the bladder 20 on the liquid chamber 11B side (that is, It moves in the "discharging direction") as indicated by the arrow X, and stops at a position where the pressures applied to both sides thereof (that is, the gas pressure in the gas chamber 11A and the liquid pressure in the liquid chamber 11B) are in equilibrium with each other. At the central portion 21A of the bladder 20 , a load is applied to the elastic material layer 21, so that the elastic material layer 21 is deformed and tensile stress is also generated. With the movement of the central portion 21A of the bladder 20 , the liquid in the liquid chamber 11B of the shell 11 is discharged toward the liquid supply source through the liquid guide hole 14a of the oil port 14.

When the liquid pressure of the liquid supply source is further reduced, the accumulator 10 according to the present invention is arranged such that the central portion 21A (ie, poppet 23) of the bladder 20 is directed toward the liquid chamber 11B side (ie, “discharging direction”). It moves and comes into contact with the oil port 14, and closes the liquid guide hole 14a of the oil port 14.

During liquid inhalation

Further, when the liquid pressure of the liquid supply source is increased as compared with the unloaded state shown in FIG. 1, in the accumulator 10 according to the present invention, the liquid is supplied from the liquid supply source to the oil supply pipe through the liquid supply pipe. It is supplied to the liquid guide hole 14a of the port 14. Along with this, since the liquid is supplied to the liquid chamber 11B of the shell 11 from the liquid guide hole 14a of the oil port 14, the liquid pressure increases.

As the liquid pressure in the liquid chamber 11B of the shell 11 increases, the central portion 21A of the bladder 20 moves toward the gas chamber 11A side (that is, the “intake direction”) as shown by the arrow Y, and both sides thereof move. The applied pressure (that is, the gas pressure in the gas chamber 11A and the liquid pressure in the liquid chamber 11B) is stopped at a position where they are in equilibrium with each other.

(Modification)

In the above description, only the case where the seal member 15 is disposed between the oil port mounting opening 11a of the shell 11 and the oil port 14 is described. However, the present invention is not limited to this. The present invention is not limited to this, and it is included even when the seal member is arranged between the oil port and the end surface of the oil port mounting opening of the shell or the outer peripheral surface.

Further, in the above, the manufacturing apparatus30The upper mold 33 included in the accumulator body is moved along the grip member 31.10 ^*  Is held by the gripping member 31 and the lower die 32, and then the gripping member 31 and the lower die 32 are moved by the arrow W.₁ Direction and manufacturing equipment30Roller 34 included in arrow W₂ Roller 34 while rotating in the direction10 ^*  Although only the case where the oil port 14 is contracted toward the engagement groove 14d by contacting the outer peripheral surface of the oil port 14 included in the above description, the present invention is not limited to this. Manufacturing equipment30The upper die 33 included in the lower die 32 is moved along the gripping member 31 and the lower die 32 is moved to the accumulator body.10 ^*  Keep away from the accumulator body10 ^*  Is held only by the gripping member 31, and then the gripping member 31 is moved to the arrow W ₁ Direction and manufacturing equipment30Roller 34 included in arrow W₂ Roller 34 while rotating in the direction10 ^*  When the oil port 14 is contracted toward the engagement groove 14d by abutting the outer peripheral surface of the oil port 14 included in the30The upper mold 33 included in the lower mold 32 is moved along the grip member 31 and the grip member 31 is separated from the lower mold 32.10 ^*  Is held only by the gripping member 31, and then the gripping member 31 is moved to the arrow W₁ Direction and manufacturing equipment30 Roller 34 included in arrow W₂ Roller 34 while rotating in the direction10 ^*  It is also included when the oil port 14 is contracted toward the engaging groove 14 d by bringing it into contact with the outer peripheral surface of the oil port 14 included in.

[0050]

[Effect of the device]

 As is clear from the above, the accumulator according to the present invention has the oil port mounting opening of the shell in which the inner space is divided into the gas chamber and the liquid chamber by the bladder, as clearly shown in the [Solution to Problem] column. An oil port is provided for the accumulator, in particular, the oil port mounting opening of the shell is engaged in the engaging groove of the oil port, and the end surface of the oil port mounting opening of the shell or the peripheral surface thereof. Since the seal member is installed between the oil port and the oil port, (i) it has the effect of eliminating welding work when installing the oil port, and (ii) heat is applied to the shell when installing the oil port. It has the effect of avoiding accumulation, and (iii) when disposing the oil port in the oil port mounting opening of the shell, foreign matter is caught in the oil port of the shell. Have the effect of the opening to the liquid chamber can be prevented that you invasion, has an effect of resulting in (iv) improve the production efficiency and quality.

[Submission date] June 10, 1992

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0050

[Correction method] Change

[Correction content]

[0050]

[Effect of the device]

As is clear from the above, the accumulator according to the present invention has the oil port mounting opening of the shell in which the inner space is divided by the bladder into the gas chamber and the liquid chamber, as clearly shown in the [Solution to Problem] column. An oil port is provided for the accumulator, in particular, the oil port mounting opening of the shell is engaged in the engaging groove of the oil port, and the end surface of the oil port mounting opening of the shell or the peripheral surface thereof. Since the seal member is installed between the oil port and the oil port, (i) it has the effect of eliminating welding work when installing the oil port in the oil port mounting opening of the shell. It has the effect of avoiding the accumulation of heat in the shell when the oil port is installed in the oil port mounting opening , and (iii) the oil port of the shell This has the effect of preventing foreign matter from entering the oil port mounting opening of the shell or the liquid chamber when the oil port is installed in the mounting opening, and consequently (iv) has the effect of improving manufacturing efficiency and quality. ..

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of an accumulator according to the present invention.

FIG. 2 is a flowchart showing a manufacturing procedure of the embodiment shown in FIG.

FIG. 3 is a cross-sectional view showing the manufacturing procedure of the embodiment shown in FIG.

FIG. 4 is a sectional view showing a manufacturing procedure of the embodiment shown in FIG.

5 is a cross-sectional view showing the manufacturing procedure of the embodiment shown in FIG.

FIG. 6 is a cross-sectional view showing the manufacturing procedure of the embodiment shown in FIG.

FIG. 7 is a cross-sectional view showing the manufacturing procedure of the embodiment shown in FIG.

[Explanation of symbols] 10・ ・ ・ ・ Accumulator 11 ・ ・ ・ ・ ・ ・ ・ Shell 11A ・ ・Gas chamber 11B Liquid chamber 11a Gas supply port 11b・ ・ ・ ・ ・ ・ ・ ・ ・ Mounting opening 12 ・ ・ ・ ・ ・ ・ Mounting member 13 ・ ・ ・ ・ ・ ・・ ・ ・ ・ Gas plug 13a ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Seal member 14 ・ ・ ・ ・ ・ ・ Oil port 14a ・ ・ ・ ・・ ・ ・ ・ ・ ・ ・ Liquid guide hole 14b ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Screw part 14c ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Base expansion part 14d・ ・ ・ ・ ・ ・ ・ ・ ・ Entrance groove 14e ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Installation groove 15 ・ ・ ・ ・ ・ ・.......... sealing member 20 ···················· bladder 21 ...............・ ・ ・ Elastic material layer 21A ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Center 21B ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Edge 21C ・ ・ ・・ ・ ・ ・ ・ Curved reversing part 21a ・ ・ ・ ・ ・ ・ ・ ・ ・ Elastic mounting part 22 ・ ・ ・ ・ ・ ・ ・ Gas shielding film 23 ・・ ・ ・ ・ Poppet 30・ ・ ・ ・ Manufacturing equipment 31 ・ ・ ・ ・・ ・ ・ Grip member 32 ・ ・ ・ ・ Lower mold 33 ・ ・ ・ ・ ・..Upper mold 34 ..

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] June 10, 1992

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Name of item to be corrected] Fig. 4

[Correction method] Change

[Correction content]

[Figure 4]

[Procedure amendment]

[Submission date] June 10, 1992

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] Explanation of code

[Correction method] Change

[Correction content]

[Explanation of symbols] 10・ ・ ・ ・ Accumulator 11 ・ ・ ・ ・ ・ ・ ・ Shell 11A ・ ・・ ・ ・ ・ ・ ・ ・ ・ ・ Gas chamber 11B ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Liquid chamber 11a ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Oil port mounting opening 11b ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Gas supply port 12 ・ ・ ・ ・ ・ ・ Mounting member 13 ・ ・ ・ ・ ・ ・・ ・ ・ Gas plug 13a ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Seal member 14 ・ ・ ・ ・ ・ ・ Oil port 14a ・・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Liquid guide hole 14b ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Screw part 14c ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Base expansion Portion 14d ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Engagement groove 14e ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Installation groove 15 ・ ・............... sealing member 20 ···················· bladder 21 ..........・ ・ ・ ・ ・ ・ ・ ・ Elastic material layer 21A ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Central part 21B ・ ・ ・ ・ ・ ・ ・ ・ ・ Peripheral part 21C ・ ・ ・ ・・ ・ ・ ・ ・ ・ ・ ・ Curved reversing part 21a ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Elastic mounting part 22 ・ ・ ・ ・ ・ ・Gas shielding film 23 ... Poppet 30 ... Production equipment 31 ...・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Grip member 32 ・ ・ ・ ・ Lower mold 33 ・ ・ ・ ・ ・ ・..Upper mold 34 ..

Claims (1)

[Scope of utility model registration request] 1. An accumulator in which an oil port is arranged with respect to an oil port mounting opening of a shell whose internal space is divided into a gas chamber and a liquid chamber by a bladder,
The oil port fitting opening (11a) of the shell is fitted in the fitting groove (14d) of the oil port, and the seal member (between the end surface or the peripheral surface of the oil port fitting opening (11a) of the shell and the oil port). An accumulator characterized by being provided with 15).